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急性呼吸窘迫綜合征機(jī)械通氣患者呼出氣冷凝液中過(guò)氧化氫和白介素6水平變化及其臨床意義研究

2015-03-23 05:34牛毓茜楊國(guó)輝
實(shí)用心腦肺血管病雜志 2015年3期
關(guān)鍵詞:存活氧化應(yīng)激氣道

牛毓茜,楊國(guó)輝

·論著·

急性呼吸窘迫綜合征機(jī)械通氣患者呼出氣冷凝液中過(guò)氧化氫和白介素6水平變化及其臨床意義研究

牛毓茜,楊國(guó)輝

目的探討急性呼吸窘迫綜合征(ARDS)機(jī)械通氣患者呼出氣冷凝液(EBC)中過(guò)氧化氫(H2O2)和白介素6(IL-6)水平變化及其臨床意義。方法選取2012年9月—2013年12月貴陽(yáng)醫(yī)學(xué)院附屬醫(yī)院內(nèi)科重癥監(jiān)護(hù)病房(MICU)收治的ARDS患者42例,均經(jīng)氣管插管或氣管切開(kāi)進(jìn)行機(jī)械通氣治療。按患者入住MICU兩周后轉(zhuǎn)歸分為存活組22例和死亡組20例,比較兩組患者機(jī)械通氣后1、3、5、7 d急性生理學(xué)及慢性健康狀況(APACHE)Ⅱ評(píng)分、APACHEⅢ評(píng)分及EBC中H2O2、IL-6水平,分析兩組患者機(jī)械通氣后1、3、5、7 d APACHEⅡ評(píng)分、APACHEⅢ評(píng)分與EBC中H2O2、IL-6水平的相關(guān)性。結(jié)果(1)存活組患者機(jī)械通氣后3、5、7 d EBC中H2O2和IL-6水平低于機(jī)械通氣后1 d,死亡組患者機(jī)械通氣后7 d EBC中H2O2和IL-6水平高于機(jī)械通氣后1、3、5 d(P<0.05)。(2)機(jī)械通氣后1 d兩組患者APACHEⅡ和APACHEⅢ評(píng)分比較,差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05);機(jī)械通氣后3、5、7 d死亡組患者APACHEⅡ和APACHEⅢ評(píng)分高于存活組(P<0.05)。(3)械通氣后1、3 d兩組患者EBC中H2O2和IL-6水平比較,差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05);機(jī)械通氣后5、7 d死亡組患者EBC中H2O2和IL-6水平均高于存活組(P<0.05)。(4)存活組患者機(jī)械通氣后不同時(shí)間點(diǎn)EBC中H2O2和IL-6水平與APACHEⅡ和APACHEⅢ評(píng)分間無(wú)直線(xiàn)相關(guān)關(guān)系(P>0.05);死亡組患者機(jī)械通氣后5、7 d EBC中H2O2水平與APACHEⅡ和APACHEⅢ評(píng)分呈正相關(guān),EBC中IL-6水平與APACHEⅡ和APACHEⅢ評(píng)分呈負(fù)相關(guān)(P<0.05)。結(jié)論ARDS機(jī)械通氣患者EBC中H2O2和IL-6水平均升高,且與病情嚴(yán)重程度相關(guān),其可作為氣道炎性反應(yīng)的監(jiān)測(cè)指標(biāo),結(jié)合APACHE評(píng)分可為評(píng)估患者預(yù)后提供參考。

呼吸窘迫綜合征,成人;呼吸,人工;呼出氣冷凝液;過(guò)氧化氫;白介素6

牛毓茜,楊國(guó)輝.急性呼吸窘迫綜合征機(jī)械通氣患者呼出氣冷凝液中過(guò)氧化氫和白介素6水平變化及其臨床意義研究[J].實(shí)用心腦肺血管病雜志,2015,23(3):25-28.[www.syxnf.net]

Niu YQ,Yang GH.Changes and clinical significances of hydrogen peroxide and interleukin-6 levels in exhaled breath condensate of patients with acute respiratory distress syndrome treated with mechanical ventilation[J].Practical Journal of Cardiac Cerebral Pneumal and Vascular Disease,2015,23(3):25-28.

機(jī)械通氣是搶救急性呼吸窘迫綜合征(ARDS)患者生命的重要措施[1]。ARDS常因感染、低氧血癥和不適當(dāng)?shù)臋C(jī)械通氣而導(dǎo)致機(jī)體氧化應(yīng)激,從而引起氧化應(yīng)激產(chǎn)物和細(xì)胞因子水平升高[2]。而氧化應(yīng)激在ARDS發(fā)病過(guò)程中起重要作用,其產(chǎn)物及細(xì)胞因子可損傷全身臟器,目前認(rèn)為其可能是引起多臟器損傷和多器官功能衰竭的重要原因。近年來(lái),檢測(cè)呼出氣冷凝液(exhaled breath condensate,EBC)越來(lái)越受到國(guó)內(nèi)外研究者的重視,其具有無(wú)創(chuàng)、實(shí)時(shí)、可重復(fù)性收集等優(yōu)點(diǎn),由于標(biāo)本直接來(lái)源于下氣道,因此結(jié)果真實(shí)可靠;且收集EBC無(wú)年齡限制,尤其適用于氣管插管和氣管切開(kāi)的危重癥患者[3-4]。目前,國(guó)內(nèi)外關(guān)于ARDS患者EBC中氧化應(yīng)激產(chǎn)物和細(xì)胞因子變化的研究報(bào)道較少。為此,本研究檢測(cè)了ARDS機(jī)械通氣患者EBC中過(guò)氧化氫(H2O2)和白介素6(IL-6)水平變化,并探討其臨床意義。

1 資料與方法

1.1 入選標(biāo)準(zhǔn)根據(jù)2012年ARDS柏林定義[5]制定納入標(biāo)準(zhǔn):(1)存在發(fā)生ARDS的高危因素;(2)發(fā)病1周內(nèi);(3)需要正壓機(jī)械通氣治療;(4)具有嚴(yán)重氧合障礙,即在吸入氧濃度(FiO2)為1.00、呼氣末正壓(PEEP)≥5 cm H2O(1 cm H2O=0.098 kPa)的情況下,氧合指數(shù)(PaO2/FiO2)≤300 mm Hg(1 mm Hg =0.133 kPa);(5)胸片示雙肺浸潤(rùn)影,無(wú)法用積液、肺不張或結(jié)節(jié)解釋。排除標(biāo)準(zhǔn):(1)年齡<18歲;(2) 1周內(nèi)曾發(fā)生急性心肌梗死(AMI);(3)心力衰竭; (4)妊娠;(5)支氣管胸膜瘺、氣胸或2周內(nèi)曾行肺葉切除術(shù);(6)合并神經(jīng)肌肉疾病或顱內(nèi)壓增高;(7)嚴(yán)重慢性呼吸系統(tǒng)疾病;(8)慢性肝臟疾病;(9)骨髓移植;(10)惡性疾病或慢性疾病終末期。

1.2 一般資料選取2012年9月—2013年12月貴陽(yáng)醫(yī)學(xué)院附屬醫(yī)院內(nèi)科重癥監(jiān)護(hù)病房(MICU)收治的符合入選條件的ARDS患者42例,均經(jīng)氣管插管或氣管切開(kāi)進(jìn)行機(jī)械通氣治療,其中男28例,女14例;年齡30~71歲,平均(58.5±18.4)歲。按患者入住MICU兩周后轉(zhuǎn)歸分為存活組22例和死亡組20例,存活組患者中男16例,女6例;年齡30~65歲,平均(57.5 ±17.4)歲;原發(fā)疾病:肺炎12例,多發(fā)傷6例,全身感染3例,術(shù)后大出血1例。死亡組患者中男12例,女8例;年齡35~71歲,平均(58.7±19.2)歲;原發(fā)疾病:肺炎10例,多發(fā)傷5例,全身感染3例,術(shù)后大出血2例。兩組患者性別、年齡及原發(fā)疾病間具有均衡性。本研究遵循貴陽(yáng)醫(yī)學(xué)院附屬醫(yī)院制定的相關(guān)倫理學(xué)標(biāo)準(zhǔn),并得到該委員會(huì)批準(zhǔn)。入選研究對(duì)象均由患者家屬簽署知情同意書(shū)。

1.3 研究方法比較兩組患者機(jī)械通氣后1、3、5、7 d急性生理學(xué)及慢性健康狀況(APACHE)Ⅱ評(píng)分和APACHEⅢ評(píng)分及EBC中H2O2和IL-6水平。并分別分析兩組患者機(jī)械通氣后1、3、5、7 d APACHEⅡ評(píng)分和APACHEⅢ評(píng)分與EBC中H2O2和IL-6水平的相關(guān)性。

1.3.1 APACHEⅡ評(píng)分和APACHEⅢ評(píng)分分別記錄患者性別、年齡、體溫、血壓、心率、呼吸頻率、吸入氧濃度(FiO2)、動(dòng)脈血?dú)夥治鱿嚓P(guān)指標(biāo)(動(dòng)脈血氧分壓、動(dòng)脈血二氧化碳分壓、pH值)、血細(xì)胞比容、白細(xì)胞計(jì)數(shù)、腎功能、肝功能、血鈉、血鉀、血糖、格拉斯哥昏迷量表評(píng)分、原發(fā)慢性疾病、入住MICU主要原因等,所有生理指標(biāo)取24 h內(nèi)最差值。

1.3.2 收集EBC參照文獻(xiàn)[2]設(shè)計(jì)外觀(guān)類(lèi)似葫蘆形狀的雙向開(kāi)口EBC玻璃收集器,裝入充滿(mǎn)冰水混合物的有機(jī)玻璃器皿中。EBC玻璃收集器兩端分別接入呼吸機(jī)呼氣端管道替代蓄水罐,持續(xù)20 min收集EBC。接入呼吸機(jī)呼氣端前應(yīng)關(guān)掉濕化瓶溫度開(kāi)關(guān),并清除呼吸機(jī)管道內(nèi)液體以防其進(jìn)入EBC玻璃收集器,造成標(biāo)本污染。待標(biāo)本收集完畢,檢測(cè)EBC總量,并進(jìn)行分裝,立即放置于冰箱保存(-80℃),留待同批檢測(cè)。

1.3.3 H2O2的測(cè)定取EBC標(biāo)本250 μl,采用化學(xué)熒光法檢測(cè)H2O2。高香草酸(homovanillic acid,HVA)、辣根過(guò)氧化酶(horsheradish peroxidase,HRP)均購(gòu)自Sigma公司(美國(guó));標(biāo)準(zhǔn)H2O2溶液購(gòu)自北京某試劑公司。建立直線(xiàn)回歸方程時(shí),需依據(jù)標(biāo)準(zhǔn)H2O2溶液水平(0.14~2.21 μmol/L)及其熒光強(qiáng)度(實(shí)測(cè)值與空白對(duì)照值的差值)繪制標(biāo)準(zhǔn)曲線(xiàn),通過(guò)直線(xiàn)回歸方程與熒光強(qiáng)度計(jì)算H2O2水平,同一份樣品分別檢測(cè)3次,取平均值。

1.3.4 IL-6的測(cè)定采用酶聯(lián)免疫吸附試驗(yàn)(ELISA)檢測(cè)IL-6,試劑盒購(gòu)自Cayman公司(美

國(guó))。依據(jù)標(biāo)準(zhǔn)樣品測(cè)定的吸光度(A)值繪制標(biāo)準(zhǔn)曲線(xiàn),并采用曲線(xiàn)擬合法求出直線(xiàn)回歸方程,再根據(jù)各待測(cè)樣本A值計(jì)算EBC中IL-6水平。

1.4 統(tǒng)計(jì)學(xué)方法應(yīng)用SPSS 19.0統(tǒng)計(jì)學(xué)軟件進(jìn)行數(shù)據(jù)處理,計(jì)量資料以(x±s)表示,組間比較采用兩獨(dú)立樣本t檢驗(yàn),組內(nèi)比較采用配對(duì)t檢驗(yàn);相關(guān)性分析采用Pearson相關(guān)分析。以P<0.05為差異有統(tǒng)計(jì)學(xué)意義。

2 結(jié)果

2.1 APACHEⅡ和APACHEⅢ評(píng)分機(jī)械通氣后1 d兩組患者APACHEⅡ和APACHEⅢ評(píng)分比較,差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05);機(jī)械通氣后3、5、7 d死亡組患者APACHEⅡ和APACHEⅢ評(píng)分高于存活組,差異有統(tǒng)計(jì)學(xué)意義(P<0.05,見(jiàn)表1)。

2.2 EBC中H2O2和IL-6水平存活組患者機(jī)械通氣后3、5、7 d EBC中H2O2和IL-6水平低于機(jī)械通氣后1 d,死亡組患者機(jī)械通氣后7 d EBC中H2O2和IL-6水平高于機(jī)械通氣后1、3、5 d(P<0.05)。機(jī)械通氣后1、3 d兩組患者EBC中H2O2和IL-6水平比較,差異無(wú)統(tǒng)計(jì)學(xué)意義(P>0.05);機(jī)械通氣后5、7 d死亡組患者EBC中H2O2和IL-6水平均高于存活組,差異有統(tǒng)計(jì)學(xué)意義(P<0.05,見(jiàn)表2)。

2.3 相關(guān)性分析存活組患者機(jī)械通氣后不同時(shí)間點(diǎn)EBC中H2O2和IL-6水平與APACHEⅡ和APACHEⅢ評(píng)分間無(wú)直線(xiàn)相關(guān)關(guān)系(P>0.05);死亡組患者機(jī)械通氣后5、7 d EBC中H2O2水平與APACHEⅡ和APACHEⅢ評(píng)分呈正相關(guān)(P<0.05);EBC中IL-6水平與APACHEⅡ和APACHEⅢ評(píng)分呈負(fù)相關(guān)(P<0.05,見(jiàn)表3)。

表1 兩組患者機(jī)械通氣后不同時(shí)間點(diǎn)APACHEⅡ和APACHEⅢ評(píng)分比較(±s,分)Table 1 Comparison of APACHEⅡscore and APACHEⅢscore between the two groups at different time points after mechanical ventilation

表1 兩組患者機(jī)械通氣后不同時(shí)間點(diǎn)APACHEⅡ和APACHEⅢ評(píng)分比較(±s,分)Table 1 Comparison of APACHEⅡscore and APACHEⅢscore between the two groups at different time points after mechanical ventilation

注:APACHE=急性生理學(xué)及慢性健康狀況;與機(jī)械通氣后1 d比較,*P<0.05;與機(jī)械通氣后3 d比較,△P<0.05;與機(jī)械通氣后5 d比較,▲P<0.05

1 d3 d5 d7 d存活組2222.56±8.2617.86±6.30*12.45±6.48*11.24±5.67*△60.85±16.2351.84±16.68*40.35±13.66*37.29±12.15組別例數(shù)APACHEⅡ評(píng)分APACHEⅢ評(píng)分1 d3 d5 d7 d *死亡組2021.23±4.6726.54±8.28*33.36±6.45*△42.08±6.24*△▲59.92±15.0175.38±11.69*89.12±13.98*△118.57±18.14*△t 001 0.911.345.9213.08 P值0.0610.0480.022<0.0050.0810.0330.018<0.值1.261.464.3310.03*

表2 兩組患者機(jī)械通氣后不同時(shí)間點(diǎn)EBC中H2O2和IL-6水平比較(±s)Table 2 Comparison of H2O2and IL-6 levels in EBC between the two groups at different time points after mechanical ventilation

表2 兩組患者機(jī)械通氣后不同時(shí)間點(diǎn)EBC中H2O2和IL-6水平比較(±s)Table 2 Comparison of H2O2and IL-6 levels in EBC between the two groups at different time points after mechanical ventilation

注:H2O2=過(guò)氧化氫,IL-6=白介素6;與機(jī)械通氣后1 d比較,*P<0.05;與機(jī)械通氣后3 d比較,△P<0.05;與機(jī)械通氣后5 d比較,▲P<0.05

1 d3 d5 d7 d存活組220.18±0.130.12±0.03*0.08±0.03*0.05±0.02*△14.66±6.1211.03±2.28*10.48±2.12*6.58±2.07組別例數(shù)H2O2(μmol/L)IL-6(ng/L) 1 d3 d5 d7 d*△死亡組200.15±0.030.17±0.040.24±0.140.35±0.15*△▲12.88±5.2313.25±3.1215.95±4.3619.18±4.19*△▲t 0.931.815.1712.031.081.928.8215.11 P值0.0790.0520.0290.0020.0930.0710.0110.002值

表3 兩組患者不同時(shí)間點(diǎn)APACHEⅡ和APACHEⅢ評(píng)分與EBC中H2O2和IL-6水平的相關(guān)性分析(r值)Table 3 Correlation between APACHEⅡscore,APACHEⅢscore and H2O2,IL-6 level in EBC between the two groups at different time points after mechanical ventilation

3 討論

H2O2是炎性細(xì)胞激活O2時(shí)產(chǎn)生的代謝產(chǎn)物,其可以引起下呼吸道蛋白酶/抗蛋白酶、氧化/抗氧化失衡,導(dǎo)致小氣道和肺組織損傷[6-7],為機(jī)體氧化應(yīng)激的重要標(biāo)志物。IL-6是具有重要作用的多功能、多向性細(xì)胞因子[8],其可以參與多種疾病的發(fā)生發(fā)展過(guò)程、機(jī)體的炎性反應(yīng)及免疫應(yīng)答。國(guó)外文獻(xiàn)報(bào)道,ARDS患者EBC中H2O2水平明顯升高,其中以膿毒癥和嚴(yán)重腦損傷所致的ARDS患者最明顯[9]。近年研究還發(fā)現(xiàn),經(jīng)典的機(jī)械通氣策略(大潮氣量、小呼吸末正壓)可以導(dǎo)致EBC中IL-6水平升高[10]。因此,探討ARDS機(jī)械通氣患者EBC中H2O2和IL-6水平變化對(duì)監(jiān)測(cè)氣道炎癥、評(píng)估病情嚴(yán)重程度及協(xié)助判斷疾病預(yù)后具有重要的臨床意義。

本研究結(jié)果顯示,存活組患者機(jī)械通氣初期EBC中H2O2和IL-6水平升高,且其水平隨病情好轉(zhuǎn)開(kāi)始降低,而死亡組患者隨病情惡化而繼續(xù)升高,估計(jì)與機(jī)械通氣患者感染重、氣道分泌物多、氣道炎性反應(yīng)劇烈、肺部氧化應(yīng)激加重而導(dǎo)致H2O2和IL-6生成超過(guò)過(guò)氧化酶清除能力有關(guān)。疾病進(jìn)一步惡化后,患者EBC中H2O2和IL-6水平明顯升高,提示感染導(dǎo)致氧自由基生成增加,導(dǎo)致氧化-抗氧化失衡和氣道炎癥。機(jī)械通氣后1、3 d兩組患者EBC中H2O2和IL-6水平無(wú)差異,機(jī)械通氣后5、7 d死亡組患者EBC中H2O2和IL-6水平高于存活組,表明在機(jī)械通氣初期患者氧化應(yīng)激和氣道炎癥程度較輕,因此該階段及時(shí)、有效地控制感染、糾正低氧血癥對(duì)患者取得良好預(yù)后具有重要意義;且ARDS機(jī)械通氣患者EBC中H2O2和IL-6水平能夠作為反映ARDS氣道炎性反應(yīng)和肺部氧化損傷增強(qiáng)的早期較敏感指標(biāo),可協(xié)助判斷病情嚴(yán)重程度及預(yù)后。

本研究結(jié)果還顯示,存活組患者APACHEⅡ和APACHEⅢ評(píng)分隨機(jī)械通氣時(shí)間延長(zhǎng)而開(kāi)始降低,死亡組則相反,且死亡組患者機(jī)械通氣3、5、7 d APACHEⅡ和APACHEⅢ評(píng)分均高于存活組。相關(guān)性分析結(jié)果顯示,存活組患者機(jī)械通氣后不同時(shí)間點(diǎn)EBC中EBC中H2O2和IL-6水平與APACHEⅡ和APACHEⅢ評(píng)分間無(wú)直線(xiàn)相關(guān)關(guān)系,而死亡組患者機(jī)械通氣后5、7 d EBC中H2O2水平與APACHEⅡ和APACHEⅢ評(píng)分呈正相關(guān),EBC中IL-6水平與APACHEⅡ和APACHEⅢ評(píng)分呈負(fù)相關(guān)。可見(jiàn)死亡組患者EBC中H2O2和IL-6水平的動(dòng)態(tài)變化趨勢(shì)與APACHEⅡ和APACⅢ評(píng)分動(dòng)態(tài)變化趨勢(shì)一致,H2O2和IL-6水平、APACHEⅡ和APACHEⅢ評(píng)分在死亡組均呈上升趨勢(shì)。因此,測(cè)定EBC中H2O2和IL-6水平還可用以輔助臨床、指導(dǎo)治療。

ARDS機(jī)械通氣患者EBC中H2O2和IL-6水平升高的具體機(jī)制尚不清楚,可能與下列因素有關(guān):(1)由于存在缺氧及感染,氧自由基釋放增加,導(dǎo)致H2O2和IL-6水平隨之增加,活性氧通過(guò)氣道上皮細(xì)胞的IL-6釋放而參與局部免疫反應(yīng)。而腫瘤壞死因子α (TNF-α)同樣可以引起IL-6 mRNA的表達(dá)增加[11]。感染及缺氧均可明顯增高患者交感神經(jīng)興奮性,引起血液中兒茶酚胺類(lèi)物質(zhì)增加,進(jìn)一步促進(jìn)IL-6分泌。(2)在感染和缺氧的共同作用下,下呼吸道中性粒細(xì)胞及巨噬細(xì)胞數(shù)量明顯增多,而這些細(xì)胞可釋放較多H2O2。(3)不適當(dāng)?shù)臋C(jī)械通氣引發(fā)或加重原有肺損傷,引起呼吸機(jī)相關(guān)性肺損傷(ventilation-associated lung injury,VALI)[10],此類(lèi)變化促使肺內(nèi)炎性遞質(zhì)向血液內(nèi)轉(zhuǎn)移,可加重或引發(fā)全身炎癥反應(yīng)綜合征,從而使EBC中H2O2和IL-6水平增加[12]。缺氧、感染和不適當(dāng)?shù)臋C(jī)械通氣是引起EBC中H2O2和IL-6水平升高的主要原因,因此,抗氧化和抗感染治療及肺復(fù)張策略可以抑制ARDS機(jī)械通氣患者肺部氧化應(yīng)激和炎性遞質(zhì)的產(chǎn)生。

綜上所述,ARDS機(jī)械通氣患者EBC中H2O2和IL-6水平均升高,且與病情嚴(yán)重程度相關(guān),其可作為氣道炎性反應(yīng)的監(jiān)測(cè)指標(biāo),結(jié)合APACHE評(píng)分可為評(píng)估患者預(yù)后提供參考。

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[5]Ranieri VM,Rubenfeld GD,Thompson BT,et al.Acute respiratory distress syndrome:the berlin definition[J].JAMA,2012,307 (23):2526-2533.

[6]楊國(guó)輝,王廣發(fā).對(duì)機(jī)械通氣患者呼出氣冷凝液中過(guò)氧化氫的研究[J].中國(guó)危重病急救醫(yī)學(xué),2008,20(6):324-326.

[7]楊國(guó)輝,王廣發(fā).慢性阻塞性肺疾病機(jī)械通氣患者呼出氣冷凝液中過(guò)氧化氫和白細(xì)胞介素-6的監(jiān)測(cè)及意義[J].中國(guó)危重病急救醫(yī)學(xué),2010,22(8):455-458.

[8]Carradi M,Pignatti P,Manini P,et al.Comparison between exhaled and sputum oxidative stress biomarkers in chronic airway inflammation[J].Eur Respir J,2004,24(6):1011-1017.

[9]張文彬,陳建榮,蔡映云.急性肺損傷/急性呼吸窘迫綜合征患者呼出氣冷凝液檢測(cè)的研究進(jìn)展[J].國(guó)際呼吸雜志,2009,29 (22):1365-1369.

[10]The Acute Respiratory Distress Syndrome Network.Ventilation with lower tidal volumes as compared with traditional tidal volumes for acute lung injury and the acute respiratory distress syndrome[J].N Engl J Med,2000,342(18):1301-1308.

[11]Roca O,Gómez-Ollés S,Cruz MJ,et al.Effects of salbutamol on exhaledbreathcondensatebiomarkersinacutelunginjury: prospective analysis[J].Crit Care,2008,12(3):R72.

[12]Halbertsma FJ,Vaneker M,scheffer GJ,et al.Cytokines and biotrauma in ventilator-induced lung injury:a critical review of the literature[J].Neth J Med,2005,63(10):382-392.

Changes and Clinical Significances of Hydrogen Peroxide and Interleukin-6 Levels in Exhaled Breath Condensate of Patients with Acute Respiratory Distress Syndrome Treated with Mechanical Ventilation

NIU Yu-qian,YANG Guohui.
The Second People's Hospital of Guiyang,Guiyang 550081,China

ObjectiveTo investigate the changes and clinical significances of hydrogen peroxide(H2O2)and interleukin-6(IL-6)levels in exhaled breath condensate(EBC)of patients with acute respiratory distress syndrome (ARDS)treated with mechanical ventilation.MethodsFrom September 2012 to December 2013,a total of 42 patients with ARDS treated with mechanical ventilation were selected in MICU,the Second People's Hospital of Guiyang,and they were divided into survival group(n=22)and death group(n=20)according to 2-week prognosis after admission of MICU.APACHEⅡscore,APACHEⅢscore,H2O2and IL-6 levels in EBC were compared between the two groups after 1 day,3 days,5 days,7 days of mechanical ventilation,and their correlations were analyzed.ResultsH2O2and IL-6 levels in EBC after 3 days,5 days,7 days of mechanical ventilation of survival group were lower than those after 1 day of mechanical ventilation,respectively;while H2O2and IL-6 level in EBC after 7 days of mechanical ventilation of death group were higher than those after 1 day,3 days,5 days of mechanical ventilation,respectively(P<0.05).No statistically significant differences of APACHEⅡscore or APACHEⅢscore was found between the two groups after 1 day of mechanical ventilation(P>0.05);while APACHEⅡscore and APACHEⅢscore of death group were higher than those of survival group after 3 days,5 days,7 days of mechanical ventilation,respectively(P<0.05).No statistically significant differences of H2O2or IL-6 level in EBC was found between the two groups after 1 day,3 days of mechanical ventilation,respectively(P>0.05);while H2O2

Respiratory distress syndrome,adult;Respiration,artificial;Exhaled breath condensate;Hydrogen peroxide;Interleukin 6

R 563.8

A

10.3969/j.issn.1008-5971.2015.03.008

2014-12-08;

2015-03-08)

(本文編輯:謝武英)

550081貴州省貴陽(yáng)市第二人民醫(yī)院呼吸內(nèi)科(牛毓茜);貴州省貴陽(yáng)醫(yī)學(xué)院附屬醫(yī)院內(nèi)科ICU(楊國(guó)輝)

and IL-6 levels in EBC of death group were higher than those of survival group after 5 days,7 days of mechanical ventilation,respectively(P<0.05).In survival group,no linear correlation was found between H2O2or IL-6 level in EBC at each time point and APACHEⅡscore or APACHEⅢscore(P>0.05);in death group,H2O2in EBC after 5 days,7 days of mechanical ventilation was positively correlated with APACHEⅡscore and APACHEⅢscore,IL-6 level in EBC after 5 days,7 days of mechanical ventilation was negatively correlated with APACHEⅡscore and APACHEⅢscore(P<0.05).ConclusionH2O2and IL-6 levels in EBC of patients with ARDS treated with mechanical ventilation are higher and correlate with severity of illness,may be monitoring index of airway inflammatory reaction and provide evidences for predicting the prognosis by combining with APACHE score.

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